Place sliced onion in the bottom of your slow cooker. Place pork directly on top, fat side up. Season with salt and pepper.
In a separate bowl, mix a couple tablespoons of the bbq sauce in with the 2 cups of water until dissolved. Pour directly on top of pork. Continue adding water until the slow cooker is filled 2/3 of the way.
Cook on high for 4-5 hours or low for 7-8 hours.
Remove pork from slow cooker and place on baking sheet. Throw out excess water and onions. Allow to cool slightly. Using two forks, gently shred the pork, discarding fat. Put the shredded pork back in the slow cooker and add the rest of the bbq sauce. Cook on high for an additional 30-60 minutes, stirring frequently. Serve on buns.
by The Savvy Kitchen